Question

me podrían ayudar a hacerlas, a las que puedan​

Answer 1

Respuesta:

$x {}^{2} - 25 = 0 \\ x {}^{2} = 0 + 25 \\ x { }^{2} = 25 \\ x = \sqrt{25} \\ x = 5$

$x {}^{2} - 4 = 0 \\ x {}^{2} = 0 + 4 \\ x {}^{2} = 4 \\ x = \sqrt{4} \\ x = 2$

$3x {}^{2} - 27 = 0 \\ 3x {}^{2} = 0 + 27 \\ 3x {}^{2} = 27 \\ x {}^{2} = 27 \div 3 \\ x {}^{2} = 9 \\ x = \sqrt{9} \\ x = 3$